Title :
Carrier Frequency Offset Estimation Using PN Sequence Iteration in OFDM Systems
Author :
Wei, Jianghua ; Liu, Yuan
Author_Institution :
Sch. of Comput. Eng., Guangxi Univ. of Technol., Liuzhou, China
Abstract :
Carrier frequency synchronization is the critical technique in orthogonal frequency division multiplexing (OFDM) systems. In this paper, an improved carrier frequency offset (CFO) estimation method is proposed, which divides the Schmidl´s CFO estimation into coarse and fine estimation by using PN sequence iteration, the new method has higher estimation accuracy and larger estimation range than that of Schmidl´s method in presence of the same computational complexity. The theoretical low bound of CFO estimation is derived by two mathematical methods. The validity of the new algorithm is verified in AWGN and multipath fading channels.
Keywords :
AWGN channels; OFDM modulation; channel estimation; computational complexity; fading channels; iterative methods; multipath channels; sequences; AWGN channel; OFDM systems; PN sequence iteration; Schmidl CFO estimation; carrier frequency offset estimation method; carrier frequency synchronization; computational complexity; mathematical methods; multipath fading channels; orthogonal frequency division multiplexing; theoretical low bound; Communication system security; Computational complexity; Computer networks; Electronic mail; Fading; Fast Fourier transforms; Frequency estimation; OFDM; Performance analysis; Wireless communication; PN sequence; carrier frequency offset; orthogonal frequency division multiplexing;
Conference_Titel :
Networks Security Wireless Communications and Trusted Computing (NSWCTC), 2010 Second International Conference on
Conference_Location :
Wuhan, Hubei
Print_ISBN :
978-0-7695-4011-5
Electronic_ISBN :
978-1-4244-6598-9
DOI :
10.1109/NSWCTC.2010.229
